At moderate pressure, the van der Waal's equation becomes:
1. PVm = RT
2. P(Vm-b) = RT
3. (P+a/V2m) (Vm )= RT
4. P = RT/Vm + a/V2m
The compressibility factor for a real gas at high pressure is:-
1. 1
2. 1+Pb/RT
3. 1-Pb/RT
4. 1-RT/Pb
A gas diffuses four time quickly as oxygen. The molecular weight of gas is:
1. 2
2. 4
3. 8
4. 16
Which among the following mixtures of gases at room temperature does not obey Dalton's law of partial pressure-
1. He and O2
2. NH3 and HCl
3. H2 and He
4. N2 and He
1.6 g O2 gas and 0.1 g H2 gas are placed in a 1.12 L flask at 0 oC. The total pressure of the gas mixture will be-
1. 2 atm
2. 3 atm
3. 4 atm
4. 1 atm
Rate of diffusion of LPG (a mixture of n-butane and propane) is 1.25 times of SO3. Hence, mass fraction of n-butane in LPG is
1. 0.75
2. 0.25
3. 0.50
4. 0.67
An open flask containing air is heated from 300 K to 500 K. The percentage of air that will escape into the atmosphere if pressure is kept constant is-
1. 80
2. 40
3. 60
4. 20
V versus T curves at constant pressure P1 and P2 for an ideal gas are as shown in the figure. The correct statement is-
1. P1>P2
2. P1<P2
3. P1=P2
4. All of the above
In van der Waal's equation of state for a non-ideal gas, the term that accounts for the intermolecular force is-
1. V-b
2. (P+a/V2)
3. RT
4. (RT)-1
20 L of SO2 diffuses through a porous partition in 60s. Volume of O2 diffuse under similar condition in 30s will be:-
1. 12.14 L
2. 14.14 L
3. 18.14 L
4. 28.14 L